Lithium metal sulfides as lithium super-ionic conductors
AssigneesUniversity of Maryland, College Park, Toyota Motor Engineering & Manufacturing North America, Inc.
InventorsYifei Mo, Xingfeng He, Chen Ling, Ying Zhang
Life of this patent
Estimating the term…
Abstract
Solid-state lithium ion electrolytes of lithium metal sulfide based composites are provided which contain an anionic framework capable of conducting lithium ions. An activation energy of the lithium metal sulfide composites is from 0.2 to 0.45 eV and conductivities are from 10−4 to 3.0 mS/cm at 300K. Composites of specific formulae are provided and methods to alter the composite materials with inclusion of aliovalent ions shown. Lithium batteries containing the composite lithium ion electrolytes are also provided. Electrodes containing the lithium metal sulfide based composites and batteries with such electrodes are also provided.
Claims11
A solid-state lithium ion electrolyte, comprising:
- at least one material selected from the group of materials consisting of compounds of formulae (I), (II) and (III)
- Liy(M1)x1AlS2 (I)
- wherein x1 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the formula is obtained, and M1 is at least one element different from Li selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12
- LiyAl1-x2(M2)x2S2 (II)
- wherein
- x2 is a number from greater than 0 to less than 1, y is a value such that the formula (II) is charge neutral, and M2 is at least one element different from Al selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16 and 17
- LiyAlS2-x3(X)x3 (III)
- wherein
- x3 is from greater than 0 to less than 2, y is a value such that the formula (III) is charge neutral, and X is at least one element different from S selected from elements of groups 15, 16 and 17.
A solid state lithium battery, comprising:
- an anode;
- a cathode;
- and
- a solid state lithium ion electrolyte located between the anode and the cathode;
- wherein
- the solid state lithium ion electrolyte comprises at least one material selected from the group of materials consisting compounds of formulae (I), (II) and (III):
- Liy(M1)x1AlS2 (I)
- wherein x1 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the formula is obtained, and M1 is at least one element different from Li selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12
- LiyAl1-x2(M2)x2S2 (II)
- wherein
- x2 is a number from greater than 0 to less than 1, y is a value such that the formula (II) is charge neutral, and M2 is at least one element different from Al selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16 and 17
- LiyAl S2-x3(X)x3 (III)
- wherein
- x3 is from greater than 0 to less than 2, y is a value such that the formula (III) is charge neutral, and X is at least one element different from S selected from elements of groups 15, 16 and 17.
An electrode for a solid state lithium battery, comprising:
- a current collector;
- and
- an electrode active layer on the current collector;
- wherein the electrode active layer comprises at least one compound selected from the group consisting of compounds of formulae (I)-(IV):
- Liy(M1)xAlS2 (I)
- wherein x1 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the formula is obtained, and M1 is at least one element different from Li selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12
- LiyAl1-x2(M2)x2S2 (II)
- wherein
- x2 is a number from greater than 0 to less than 1, y is a value such that the formula (II) is charge neutral, and M2 is at least one element different from Al selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16 and 17
- LiyAlS2-x3(X)x3 (III)
- wherein
- x3 is from greater than 0 to less than 2, y is a value such that the formula (III) is charge neutral, and X is at least one element different from S selected from elements of groups 15, 16 and 17.
An electrode for a solid state lithium battery, comprising:
- a current collector;
- an electrode active layer on the current collector;
- and a coating layer on the electrode active layer;
- wherein the coating layer on the electrode active layer comprises at least one compound selected from the group consisting of compounds of formulae (I)-(III):
- Liy(M1)x1AlS2 (I)
- wherein x1 is a number from greater than 0 to less than 1, y is a value such that charge neutrality of the formula is obtained, and M1 is at least one element different from Li selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12
- LiyAl1-x2(M2)x2S2 (II)
- wherein
- x2 is a number from greater than 0 to less than 1, y is a value such that the formula (II) is charge neutral, and M2 is at least one element different from Al selected from elements of groups 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16 and 17;
- LiyAlS2-x3(X)x3 (III)
- wherein
- x3 is from greater than 0 to less than 2, y is a value such that the formula (III) is charge neutral, and X is at least one element different from S selected from elements of groups 15, 16 and 17.
Dependencies are inferred from the claim text.